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| 1 | +// Copyright (c) Tunnel Vision Laboratories, LLC. All Rights Reserved. |
| 2 | +// Licensed under the Apache License, Version 2.0. See LICENSE in the project root for license information. |
| 3 | + |
| 4 | +namespace StyleCop.Analyzers.Lightup |
| 5 | +{ |
| 6 | + using System; |
| 7 | + using System.Reflection; |
| 8 | + using Microsoft.CodeAnalysis; |
| 9 | + using Microsoft.CodeAnalysis.CSharp; |
| 10 | + using Microsoft.CodeAnalysis.CSharp.Syntax; |
| 11 | + |
| 12 | + internal struct DeclarationExpressionSyntaxWrapper : ISyntaxWrapper<ExpressionSyntax> |
| 13 | + { |
| 14 | + private const string DeclarationExpressionSyntaxTypeName = "Microsoft.CodeAnalysis.CSharp.Syntax.DeclarationExpressionSyntax"; |
| 15 | + private static readonly Type DeclarationExpressionSyntaxType; |
| 16 | + |
| 17 | + private static readonly Func<ExpressionSyntax, TypeSyntax> TypeAccessor; |
| 18 | + private static readonly Func<ExpressionSyntax, CSharpSyntaxNode> DesignationAccessor; |
| 19 | + private static readonly Func<ExpressionSyntax, TypeSyntax, ExpressionSyntax> WithTypeAccessor; |
| 20 | + private static readonly Func<ExpressionSyntax, CSharpSyntaxNode, ExpressionSyntax> WithDesignationAccessor; |
| 21 | + |
| 22 | + private readonly ExpressionSyntax node; |
| 23 | + |
| 24 | + static DeclarationExpressionSyntaxWrapper() |
| 25 | + { |
| 26 | + DeclarationExpressionSyntaxType = typeof(CSharpSyntaxNode).GetTypeInfo().Assembly.GetType(DeclarationExpressionSyntaxTypeName); |
| 27 | + TypeAccessor = LightupHelpers.CreateSyntaxPropertyAccessor<ExpressionSyntax, TypeSyntax>(DeclarationExpressionSyntaxType, nameof(Type)); |
| 28 | + DesignationAccessor = LightupHelpers.CreateSyntaxPropertyAccessor<ExpressionSyntax, CSharpSyntaxNode>(DeclarationExpressionSyntaxType, nameof(Designation)); |
| 29 | + WithTypeAccessor = LightupHelpers.CreateSyntaxWithPropertyAccessor<ExpressionSyntax, TypeSyntax>(DeclarationExpressionSyntaxType, nameof(Type)); |
| 30 | + WithDesignationAccessor = LightupHelpers.CreateSyntaxWithPropertyAccessor<ExpressionSyntax, CSharpSyntaxNode>(DeclarationExpressionSyntaxType, nameof(Designation)); |
| 31 | + } |
| 32 | + |
| 33 | + private DeclarationExpressionSyntaxWrapper(ExpressionSyntax node) |
| 34 | + { |
| 35 | + this.node = node; |
| 36 | + } |
| 37 | + |
| 38 | + public ExpressionSyntax SyntaxNode => this.node; |
| 39 | + |
| 40 | + public TypeSyntax Type |
| 41 | + { |
| 42 | + get |
| 43 | + { |
| 44 | + return TypeAccessor(this.SyntaxNode); |
| 45 | + } |
| 46 | + } |
| 47 | + |
| 48 | + public VariableDesignationSyntaxWrapper Designation |
| 49 | + { |
| 50 | + get |
| 51 | + { |
| 52 | + return (VariableDesignationSyntaxWrapper)DesignationAccessor(this.SyntaxNode); |
| 53 | + } |
| 54 | + } |
| 55 | + |
| 56 | + public static explicit operator DeclarationExpressionSyntaxWrapper(SyntaxNode node) |
| 57 | + { |
| 58 | + if (node == null) |
| 59 | + { |
| 60 | + return default(DeclarationExpressionSyntaxWrapper); |
| 61 | + } |
| 62 | + |
| 63 | + if (!IsInstance(node)) |
| 64 | + { |
| 65 | + throw new InvalidCastException($"Cannot cast '{node.GetType().FullName}' to '{DeclarationExpressionSyntaxTypeName}'"); |
| 66 | + } |
| 67 | + |
| 68 | + return new DeclarationExpressionSyntaxWrapper((ExpressionSyntax)node); |
| 69 | + } |
| 70 | + |
| 71 | + public static implicit operator ExpressionSyntax(DeclarationExpressionSyntaxWrapper wrapper) |
| 72 | + { |
| 73 | + return wrapper.node; |
| 74 | + } |
| 75 | + |
| 76 | + public static bool IsInstance(SyntaxNode node) |
| 77 | + { |
| 78 | + return node != null && LightupHelpers.CanWrapNode(node, DeclarationExpressionSyntaxType); |
| 79 | + } |
| 80 | + |
| 81 | + public DeclarationExpressionSyntaxWrapper WithType(TypeSyntax type) |
| 82 | + { |
| 83 | + return new DeclarationExpressionSyntaxWrapper(WithTypeAccessor(this.SyntaxNode, type)); |
| 84 | + } |
| 85 | + |
| 86 | + public DeclarationExpressionSyntaxWrapper WithDesignation(VariableDesignationSyntaxWrapper designation) |
| 87 | + { |
| 88 | + return new DeclarationExpressionSyntaxWrapper(WithDesignationAccessor(this.SyntaxNode, designation.SyntaxNode)); |
| 89 | + } |
| 90 | + } |
| 91 | +} |
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